MLA

Sanborn-Perris Map Co., issuing body. Insurance Maps of Hartford, Connecticut. Volume 1. 1900. https://collections.library.yale.edu/catalog/11129045.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (1900). Insurance maps of Hartford, Connecticut. Volume 1. [Atlases--Connecticut--Hartford--1900.--local, Atlases--Connecticut--West Hartford--1900.--local, Cadastral maps--Connecticut--Hartford--1900.--local, Cadastral maps--Connecticut--West Hartford--1900.--local, Fire insurance maps--Connecticut--Hartford--1900.--local, Fire insurance maps--Connecticut--West Hartford--1900.--local]. https://collections.library.yale.edu/catalog/11129045.